solanum-vs-hackint-and-char.../extensions/m_webirc.c
Ed Kellett 861a544541 m_webirc: Blow away ident if we've got it
Previously, anyone on the WEBIRC gateway would get its ident if it
advertised one, which seems wrong to me.

This allows ident to be used with WEBIRC while still letting users send
their own ~username in band.
2020-11-02 19:59:29 +00:00

196 lines
5.6 KiB
C

/*
* ircd-ratbox: A slightly useful ircd.
* m_webirc.c: Makes CGI:IRC users appear as coming from their real host
*
* Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
* Copyright (C) 1996-2002 Hybrid Development Team
* Copyright (C) 2002-2006 ircd-ratbox development team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
/* Usage:
* auth {
* user = "webirc@<cgiirc ip>"; # if identd used, put ident username instead
* password = "<password>"; # encryption possible
* spoof = "webirc."
* class = "users";
* };
* Possible flags:
* encrypted - password is encrypted (recommended)
* kline_exempt - klines on the cgiirc ip are ignored
* dlines are checked on the cgiirc ip (of course).
* k/d/x lines, auth blocks, user limits, etc are checked using the
* real host/ip.
* The password should be specified unencrypted in webirc_password in
* cgiirc.config
*/
#include "stdinc.h"
#include "client.h" /* client struct */
#include "match.h"
#include "hostmask.h"
#include "send.h" /* sendto_one */
#include "numeric.h" /* ERR_xxx */
#include "ircd.h" /* me */
#include "msg.h"
#include "parse.h"
#include "modules.h"
#include "s_serv.h"
#include "hash.h"
#include "s_conf.h"
#include "reject.h"
static const char webirc_desc[] = "Adds support for the WebIRC system";
static void mr_webirc(struct MsgBuf *msgbuf_p, struct Client *, struct Client *, int, const char **);
struct Message webirc_msgtab = {
"WEBIRC", 0, 0, 0, 0,
{{mr_webirc, 5}, mg_reg, mg_ignore, mg_ignore, mg_ignore, mg_reg}
};
mapi_clist_av1 webirc_clist[] = { &webirc_msgtab, NULL };
static void new_local_user(void *data);
mapi_hfn_list_av1 webirc_hfnlist[] = {
/* unintuitive but correct--we want to be called first */
{ "new_local_user", (hookfn) new_local_user, HOOK_LOWEST },
{ NULL, NULL }
};
DECLARE_MODULE_AV2(webirc, NULL, NULL, webirc_clist, NULL, webirc_hfnlist, NULL, NULL, webirc_desc);
/*
* mr_webirc - webirc message handler
* parv[1] = password
* parv[2] = fake username (we ignore this)
* parv[3] = fake hostname
* parv[4] = fake ip
*/
static void
mr_webirc(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
struct ConfItem *aconf;
const char *encr;
struct rb_sockaddr_storage addr;
int secure = 0;
if (source_p->flags & FLAGS_SENTUSER || !EmptyString(source_p->name))
{
exit_client(client_p, source_p, &me, "WEBIRC may not follow NICK/USER");
}
aconf = find_address_conf(client_p->host, client_p->sockhost,
IsGotId(client_p) ? client_p->username : "webirc",
IsGotId(client_p) ? client_p->username : "webirc",
(struct sockaddr *) &client_p->localClient->ip,
GET_SS_FAMILY(&client_p->localClient->ip), NULL);
if (aconf == NULL || !(aconf->status & CONF_CLIENT))
return;
if (!IsConfDoSpoofIp(aconf) || irccmp(aconf->info.name, "webirc."))
{
/* XXX */
sendto_one(source_p, "NOTICE * :Not a CGI:IRC auth block");
return;
}
if (EmptyString(aconf->passwd))
{
sendto_one(source_p, "NOTICE * :CGI:IRC auth blocks must have a password");
return;
}
if (!IsSecure(source_p) && aconf->flags & CONF_FLAGS_NEED_SSL)
{
sendto_one(source_p, "NOTICE * :Your CGI:IRC block requires TLS");
return;
}
if (EmptyString(parv[1]))
encr = "";
else if (IsConfEncrypted(aconf))
encr = rb_crypt(parv[1], aconf->passwd);
else
encr = parv[1];
if (encr == NULL || strcmp(encr, aconf->passwd))
{
sendto_one(source_p, "NOTICE * :CGI:IRC password incorrect");
return;
}
if (rb_inet_pton_sock(parv[4], &addr) <= 0)
{
sendto_one(source_p, "NOTICE * :Invalid IP");
return;
}
source_p->localClient->ip = addr;
source_p->username[0] = '\0';
ClearGotId(source_p);
if (parc >= 6)
{
const char *s;
for (s = parv[5]; s != NULL; (s = strchr(s, ' ')) && s++)
{
if (!ircncmp(s, "secure", 6) && (s[6] == '=' || s[6] == ' ' || s[6] == '\0'))
secure = 1;
}
}
if (secure && !IsSecure(source_p))
{
sendto_one(source_p, "NOTICE * :CGI:IRC is not connected securely; marking you as insecure");
secure = 0;
}
if (!secure)
{
ClearSecure(source_p);
}
rb_inet_ntop_sock((struct sockaddr *)&source_p->localClient->ip, source_p->sockhost, sizeof(source_p->sockhost));
if(strlen(parv[3]) <= HOSTLEN)
rb_strlcpy(source_p->host, parv[3], sizeof(source_p->host));
else
rb_strlcpy(source_p->host, source_p->sockhost, sizeof(source_p->host));
/* Check dlines now, klines will be checked on registration */
if((aconf = find_dline((struct sockaddr *)&source_p->localClient->ip,
GET_SS_FAMILY(&source_p->localClient->ip))))
{
if(!(aconf->status & CONF_EXEMPTDLINE))
{
exit_client(client_p, source_p, &me, "D-lined");
return;
}
}
sendto_one(source_p, "NOTICE * :CGI:IRC host/IP set to %s %s", parv[3], parv[4]);
}
static void
new_local_user(void *data)
{
struct Client *source_p = data;
struct ConfItem *aconf = source_p->localClient->att_conf;
if (!irccmp(aconf->info.name, "webirc."))
exit_client(source_p, source_p, &me, "Cannot log in using a WEBIRC block");
}